However, with the Londoners unable to find a suitable replacement for the colossal Belgian, it seems Courtois may in fact be staying put. Chelsea will no doubt have been reluctant to lose a player who still has resale value on a free transfer.
Chelsea boss Maurizio Sarri says he is "confident" Willian will stay at the club - but admits he does not know where Thibaut Courtois' future lies.
Butland started his career at Birmingham City and broke into their first-team in the 2012/13 season after impressing them on loan at Cheltenham Town.
The Daily Express claim Chelsea have weighed up their options, and although the club were once open to the sale, Courtois will now not be departing.
"He is a very young player".
"But in this moment of the season it's very important, the performance".
Sarri's men don't have long to ponder the loss in Ireland, for they now shift their focus to Sunday's Community Shield with Manchester City.
"We have to improve, of course".
Sarri has little scope to discipline Willian even if he is inclined to do so; with preseason nearly at an end his other options on the wing are limited to Pedro Rodriguez, Hudson-Odoi and the newly recast Victor Moses.
Cesc Fabregas may miss out due to a minor knee problem.